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• Should I prevent search engines indexing tag/category pages?

  - by Macha

  On my site, I currently have no special rules for search engines. It is a blog, statically generated using a Python program. When I search for some of my articles on Google, there is usually a tag or category page included in the results. Sometimes it even ranks ahead of the article itself. Obviously, as these links aren't always going to have the article on them, this aren't the results I want people to click on. So, I'm thinking of setting noindex on these pages. Is there any possible downside to doing so? Is this possible to do via robots.txt, or do I have to add it to all the relevant templates? All I can find for robots.txt are ways to stop the search engine crawling those pages, which isn't what I want - while I don't want them indexed, it's still the only surefire way to find all my blog posts.

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• Mod Rewrite not working on my addon domain

  - by Ogugua Belonwu

  have a wordpress website on my main domain For the wordpress website i have this in my .htaccess file # BEGIN WordPress <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteCond %{REQUEST_FILENAME} !-f RewriteCond %{REQUEST_FILENAME} !-d RewriteRule . /index.php </IfModule> # END WordPress I just created an addon domain and wanted to use new rules for it I created a .htaccess file and put it inside the addon folder eg /newaddon In the .htaccess file i have: Options -Indexes <IfModule mod_rewrite.c> RewriteEngine On RewriteBase / RewriteRule ^readjob/(.*)/(.*)/(.*)/$ readjob.php?id=$1&amp;cat=$2&amp;title=$3 </IfModule> The url stucture i have is this: http://www.website.com/readjob/3/jobs/web-designers-potech-integrated-services/ But it keeps telling me link is broken I dont know what to do, pls i need assistance (pls i just learnt mod rewriting today, so clarity will be highly appreciated) Thanks

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• Tree position terminology/naming

  - by wst

  This is a naming things question. I am processing trees (XML documents), and there are often special rules applied to nodes based on structure. It's been very difficult coming up with concise naming conventions for some cases, namely for nodes in the first position among their siblings, along with some recursive relationship: Given an arbitrary node, I want to describe its first child, and then that node's first child, and so on recursively. Given another arbitrary node, I want to describe its parent if the parent is first among its siblings, and that parent's parent if it's first, and so on recursively. Is there existing terminology to describe these tree positions? How would you name a variable or function that captures one of these cases so that it's intuitive to an unfamiliar developer trying to understand an algorithm?

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• Does approaching SICP in clojure have a high chance of success? [on hold]

  - by ironicaldiction

  I am a third year bachelor student in a software engineering program, and I brought up the idea of reading SICP to an adviser to gain a deeper and more fundamental understanding of the principles behind all this software we engineer. He suggested not to learn scheme to complete the book (because it's not as common as modern dialects of lisp) but to do the exercises in clojure instead. My worry is that completing exercises in clojure instead of scheme will make an already difficult book tortuous. If I do attempt the book's exercises in the more modern clojure, will it be difficult to succeed (for example, because I can't find any real solutions, the syntax they teach for scheme is different, etc.), or do you think approaching the book in clojure could be just as successful as approaching it in scheme? I'm really not knowledgeable enough about either clojure or scheme to make an argument about this, so I wanted to know if I should bring it up or not.

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• Modeling Websites and Native Code

  I've blogged previously about the Architecture tools in Visual Studio 2010. These tools offer a fantastic way to understand an existing application, design some new functionality, and validate an implementation against architectural rules and constraints. Recently, we announced the availability of the Visualization and Modeling Feature Pack for MSDN subscribers, which complements the Architecture tools in Visual Studio 2010 by adding support for: C/C++ code visualization Website visualization Improved...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• Modeling Websites and Native Code

  I've blogged previously about the Architecture tools in Visual Studio 2010. These tools offer a fantastic way to understand an existing application, design some new functionality, and validate an implementation against architectural rules and constraints. Recently, we announced the availability of the Visualization and Modeling Feature Pack for MSDN subscribers, which complements the Architecture tools in Visual Studio 2010 by adding support for: C/C++ code visualization Website visualization Improved...Did you know that DotNetSlackers also publishes .net articles written by top known .net Authors? We already have over 80 articles in several categories including Silverlight. Take a look: here.

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• What is an acceptable GC frequency for a SlimDX/Windows/.NET game?

  - by Rei Miyasaka

  I understand that the Windows GC is much better than the Xbox/WP7 GC, being that it's generational and multithreaded -- so I don't need to worry quite as much about avoiding memory allocation. SlimDX even has some unavoidable functions that generate some amount of garbage (specifically, MapSubresource creates DataBoxes), yet people don't seem to be too upset about it. I'd like to use some functional paradigms to write my code too, which also means creating objects like closures and monads. I know premature optimization isn't a good thing, but are there rules of thumb or metrics that I can follow to know whether I need to cut down on allocations? Is, say, one gen 0 GC per frame too much? One thing that has me stumped is object promotions. Gen 0 GCs will supposedly finish within a millisecond or two, but if I'm understanding correctly, it's the gen 1 and 2 promotions that start to hurt. I'm not too sure how I can predict/prevent these.

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• MVC 2 in 2 Minutes!

  - by Steve Michelotti

  In a couple of recent Code Camps, I’ve given my presentation: Top 10 Ways MVC 2 Will Boost Your Productivity. In the presentation, I cover all major new features introduced in MVC 2 with a focus on productivity enhancements. To drive the point home, I conclude with a final demo where I build a couple of screens from scratch highlighting many (but not all) of the features previously covered in the talk. A couple of weeks ago, I was asked to make it available online so here it is. In 2 minutes the demo builds a couple screens from scratch that provide a goal setting tracker for a user. MVC 2 features included in the video are: Template Helpers / Editor Templates Server-side/Client-side Validation Model Metadata for View Model HTML Encoding Syntax Dependency Injection Abstract Controllers Custom T4 Templates Custom MVC Visual Studio 2010 Code Snippets The complete code samples and slide deck can be downloaded here: Top 10 Ways MVC 2 Will Boost Your Productivity. Enjoy! (Right-click and Zoom to view in full screen)   Click here for Direct link to video

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• Why is this 8 puzzle unsolvable?

  - by Ashwin

  I am developing a 8 puzzle game. I went through the rules in this (see Detecting Unsolvable Puzzles) link, which tell you how to detect if an initial state is unsolvable. It says that if the number of inversions is odd, then the goal state cannot be reached and if even the goal state can be reached. Inversion is defined as Given a board, an inversion is any pair of blocks i and j where i < j but i appears after j when considering the board in row-major order (row 0, followed by row 1, and so forth). There is a 8-puzzle solver(applet) here. Choose 8-puzzle from the options. 1,0,3,2,4,5,6,7,8 and 7,0,2,8,5,3,6,4,1 As you can see both of them contain an even number of inversions. Still the program says that the puzzle is unsolvable. So is the Princeton link wrong?

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• I am thinking about developing a game, but i am single developer? [on hold]

  - by Jake Doe

  Since very little i wanted to create a game, my place where my rules apply, where i am not limited. Now that i am capable of doing. I am asking myself should i start ? I have already the idea i have choosen the engine, only coding and artwork is required. The engine i have choose cost is quite high(50k), i can try throught a kickstarter campaign or indiegogo. But shouid I ? Please give me your opinion. Thank you :)

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• APress Deal of the Day 9/Jan/2011 - Pro Silverlight 3 in VB

  - by TATWORTH

  Today's $10 deal from APress at http://www.apress.com/info/dailydeal is Pro Silverlight 3 in VB Silverlight is a lightweight browser plug-in that frees your code from the traditional confines of the browser. It's a rules-changing, groundbreaking technology that allows you to run rich client applications right inside the browser. Even more impressively, it's able to host true .NET applications in non-Microsoft browsers (like Firefox) and on non-Microsoft platforms (like Mac OS X). Silverlight is still new and evolving fast, and you need a reliable guidebook to make sense of it.

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• Is there a good book or articles to learn about 2D Game Design and Effects?

  - by user28015

  I am not looking for a read how to develop games and how to implement one. I am looking for a general about possible effects in 2D Games and about general design of modern 2D gaming. I have programmed several smaller games over the years and also read books like "Golden Rules of Game Programming" by Martin Bronwlo. So I know how to implement games. What I am looking for are 2 things: Finishing touches such as effects like explosions, particles etc. Not how to make them, but how to design them so it looks right and cool. How to make a 2D game feel "more right" so that users get a satisfying gaming experience. I played a lot of 2D games but I could use some more advice.

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• s expression representation for c

  - by wirrbel

  Experimenting with various lisps lately (clojure especially) i have wondered if there are any s expression based representations of (subsets) of c, so you could use lisp/closure to write macros and then convert the s-expression c tree to pure c. I am not asking for a to-c-compilers of lisp/scheme/clojure but more of using lisps to transform a c syntax tree. Little background to why i am asking this question: i find myself to really enjoy certain clojure macros like the threading macros -> doto etc. And i feel that they would be great in a non FP environment as well.

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• Is it possible to offer an affiliate program for your iOS or Android app?

  - by wilfra

  Independent of the App Store or Google Play, is there a way to track where new downloads or paying customers came from? For example, if an app advertises my app in theirs - is there a way for me to find out which users actually downloaded it? And then pay that app owner a commission? On the web this is done via a tracking URL which places a cookie on a users machine. If they signup within a designated timeframe, they are 'tracked to' whomever had their affiliate code in the URL they clicked and that person would receive commissions. How could this be done with native mobile apps, while not violating Apple/Google rules?

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• How I can Install csh as a non-root user?

  - by user288566

  Hi I need csh for installing a package but I am not root user... I want to install it for my user. I installed csh_20070713.orig.tar.gz, csh_20070713.diff.gz and csh_20070713-2ubuntu1.dsc But there is not dpkg-source command... then I did following procedure: untar *.tar.gz mv csh_20070713.orig csh_20070713 mkdir csh_20070713/debian gunzip csh_20070713.diff.gz patch -p0 < csh_20070713.diff chmod +x csh_20070713/debian/rules but I do not know what should I do next! I used make and make install command in csh_20070713 directory and also debian directory but nothing happened... Plz help me... Thanks

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• How do I combine all lines in a text file into a single line?

  - by John

  I want to get all lines in a text into one line. I'm a beginner at coding trying to learn by doing. I've spent four hours trying to solve this problem. I know there's a simple solution to this problem. Here's what I've been trying. sed -e 'N;s/\n//' myfile.txt #Does nothing sed -e :a -e N -e 's/\n/ /' -e ta myfile.txt #output all messed up and I can't make head nor tail of the syntax cat myfile.txt | tr -d '\n' myfile.txt # Deletes all lines Here's the text file: 500212 262578-4-4 23200 GRIFFITH LABORATORIES LTD GRIFFITH LABORATORIES SOUTH DUBLIN COUNTY COUNCIL OFFICE OFFICE (INDUSTRIAL) List Rateable 2 Pineview Industrial Estate Firhouse Road Knocklyon 31 Dec 2007 01 Jan 2008" I can't figure out where I've gone wrong....

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• What is use of universal character names in identifiers in C++11

  - by Jan Hudec

  The new C++ standard specifies universal character names, written as \uNNNN and \UNNNNNNNN and representing the characters with unicode codepoints NNNN/NNNNNNNN. This is useful with string literals, especially since explicitly UTF-8, UTF-16 and UCS-4 string literals are also defined. However, the universal character literals are also allowed in identifiers. What is the motivation behind that? The syntax is obviously totally unreadable, the identifiers may be mangled for the linker and it's not like there was any standard function to retrieve symbols by name anyway. So why would anybody actually use an identifier with universal character literals in it?

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• Reasons for Pair Programming

  - by Jeff Langemeier

  I've worked in a few shops where management has passed the idea of pair programming either to me or another manager/developer, and I can't get behind it at all. From a developer stand-point I can't find a reason why moving to this coding style would be beneficial, nor as a manager of a small team have I seen any benefit. I understand that it helps on basic syntax errors and can be helpful if you need to hash something out, but managers that are out of the programming loop seem to keep seeing it as a way of keeping their designers from going to Facebook or Reddit than as a design tool. As someone close to the development floor that apparently can't quite understand from a book tossed my way or a wiki page on the subject... from a high level management position, what are the benefits of Pair Programming when dealing with Scrum or Agile environments?

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• SQL Bits VII

  - by Tomaz.tsql

  I was very happy to dive in into SQL Bits VII. Several interesting presentations, interesting concepts, advices and most of all interesting people. Some things actually disturb me. 1. the outlook of all presentations. I would recommend to have standardized outlook of all presentations for each of the presenter. Meaning, to have a general rules of PPT design (fonts, views, etc.), general diagrams, pictures that can be used by everyone (something like techEd introduced as well as SQL PASS). 2. access...(read more)

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• Aptana Studio 3 does not start up in Ubuntu 12.10

  - by Agent47DarkSoul

  I followed the instructions provided here to install Aptana Studio 3 in my Ubuntu 12.10. I have completed all the steps with out any problems. When I click the Aptana icon in my Unity bar nothing happens. No error pops up! I gave permission on the sh file and on the directory (/opt/Aptana_Studio_3) but still same problem. If I try executing the sh file in the /opt/Aptana_Studio_3 folder, it says "Syntax error: "(" unexpected Aptana". Also I cannot execute the Aptana binary file directly. I have been trying to solve the problem for a while now. Any help would be much appreciated. EDIT: I have Oracle Java 7 installed. I have read some post about backwards compatibility problem with Java 6 but dont know whether that's the issue. I will edit the question if I find something new.

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• ECMAScript : ajouts et modifications de la 5e édition qui introduisent des incompatibilités avec le 3e

  (une petite traduction rapide des changements impactant entre la v5 et la v3. les numéros correspondent aux chapitres de la norme) Ecma-362 alias EcmaScript5 Annex E Ajouts et modifications dans la 5e édition qui introduisent des incompatibilités avec le 3e édition 7.1: si des caractères de contrôle Unicode sont présent dans une expression String ou une expression d'ExpressionRegulière ils seront inclus dans la l'expression. alors que dans l'édition 3 ils étaient ignorés. 7.2: le caractère Unicode <BOM> (Byte Order Mark) est maintenant traité comme un whitespace alors qu'il provoquait une Syntax Error dans l'édition ...

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• Is there much difference between X86 Assembly language on Windows and Linux?

  - by Logan545

  I'm a complete beginner at Assembly, and my aim is to learn as much as I can to do with Assembly to one day I can reach expert level (I know I'm way off right now, but you never know). My only problem is this: I've got two books which both teach assembly, one on a Linux and the other on Windows. They are Jeff Duntemann's Assembly Language Step By Step (the linux one) and Introduction to 80x86 Assembly Language and Computer Architecture (the windows version). If I want to get the best out of assembly, should I do this on linux and windows? Also, is the syntax the same on Windows and Linux or will I have teach my self again when learning on the other OS( which is my main concern, I want to be able to use assembly on windows and linux).

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• Programming curricula

  - by davidk01

  There are a lot of schools that teach Java and C++ but whenever I see the syllabus for one of these classes it's almost always some cut and dry OO stuff with possibly some boring end of class project. With all the little gadgets and emulators for those gadgets why aren't more schools re-purposing those classes so that the students work their way up to building android or meego applications? That way students get to experience first hand what it takes to engineer/build a piece of software instead of doing finger exercises with syntax. Practically every self-taught programmer that I know started programming because they wanted to make their gadgets do things for them. They didn't learn a programming language with an abstract conception of using it on some far distant project so I don't understand why schools don't emulate this style of teaching.

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• Which mobile device is appropriate as a utility tool for a web master?

  - by Kayle

  Basically, I'm looking for a device to use on the road and I would prefer to not have to sit down for the majority of the tasks (which rules out netbooks, in my mind). I'm also hoping to spend less than $500. This is what I'd like to "capably" be able to do on the device: Browse the web in non-mobile format, flash is a plus Email, chat, etc Have access to a decent text editor and ftp OR a browser that supports BESPIN/ACE Some sort of SSH support I'm looking at rooted Android phones and iPhone/iPads... though the phone aspect is only icing (it would be cool to consolidate the two devices and have net access through cell networks, but I'm not married to the idea). Are there cheap linux tablets that are ready for prime-time yet? I suppose that would be ideal. All suggestions welcome!

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• How do I start Nautilus as root?

  - by Pho swan

  I got problem with nautilus in Ubuntu 12.04 LTS when i run command "gksu nautilus /" password ask box appear and I type my super-user password , than password box is disappear and nautilus is not open. . when i try to open nautilus via normal user in command box . "nautilus" the folder is open up. when i try in terminal ... $sudo nautilus I got following error $ sudo nautilus / ** (nautilus:8523): WARNING **: Command line `dbus-launch --autolaunch=2c8ce9b7da2257c2609b749700000007 --binary-syntax --close-stderr' exited with non-zero exit status 1: Autolaunch error: X11 initialization failed.\n Could not parse arguments: Cannot open display: how can i fix this error..

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